According to reports, Academy president Cheryl Boone Isaacs said in a letter to members a new rule will ban electronic devices backstage to avoid similar errors happening again.

PwC's Brian Cullinan and Marth Ruiz, the duo behind the blunder, were seen posting photos to Twitter just before the wrong envelope was handed out.

Boone Isaacs said: "After a thorough review, including an extensive presentation of revised protocols and ambitious controls, the board has decided to continue working with PwC."

She added PwC's US chair, Tim Ryan, will take a greater role in overseeing future ceremonies while a third person on the PwC team who knows all of the winners will sit in the control room during the event.

However, Cullinan and Ruiz will likely never return to the star-studded event, according to the president of the Academy.